Abstract: Through the analysis of petrol seismic exploration profiles and the tectonic background of Jianghan Basin in Hubei province,a evolution model of the basin with 3 phases is proposed. The foreland basin phase was controlled mainly by the thrust of Qinlin-Dabie orogenic area during later Jurassic and middle Triassic; the rift basin phase is controlled by fault and deasil circumvolving with the change of stressing during Cretaceous and Paleocene, with strong magma activity; and in the depression basin phase the basin descends as a whole, and magma activity stopped. With the study of the sections and the basin evolution,a structure pattern is set up. 4 NNW descend belts and 3 NEE descend belts is the main structure separated by faults and low uplands. Combining the data of present stress,GPS and earthquakes,the low risk of earthquake and low activity is concluded for the Jianghan basin,and the hypocentral depth is about 14km or by the bottom of the basin in middle descend belt of Qianjiang-Mianyang.

Key words: Jianghan Basin, Basin evolution, Structure pattern, Earthquake